<div class="loading">
    请稍等，正在加载中......
</div>

<style>
.loading {
    position: fixed;
    padding: 62px 0 0 0;
    z-index: 2;
    width: 126px;
    height: 26px;
    top: 50%;
    left: 50%;
    text-align: center;
    vertical-align: bottom;
    background: url(images/loading-343b2e4326.gif) top center no-repeat;
    margin: -43px 0 0 -63px;
}
body {
    font: 12px/1 "Microsoft Yahei","微软雅黑","黑体","SimHei",Arial,sans-serif;
    color: #333333;
}
</style>